docs: def stop_NoteContainer(self, notecontainer):
          """Add note_off events for each note in the NoteContainer to the
          track_data."""
          # if there is more than one note in the container, the deltatime should
          # be set back to zero after the first one has been stopped
          if len(notecontainer) <= 1:
              [self.stop_Note(x) for x in notecontainer]
          else:
              self.stop_Note(notecontainer[0])
              self.set_deltatime(0)
              [self.stop_Note(x) for x in notecontainer[1:]]